Study on the Permeability Change Characteristic of Gas-Bearing Coal under Cyclic Loading and Unloading Path

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/5562628/figures/5562628.fig.009a.svgz" name="5562628.fig.009a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Permeability damage rate under pass I</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/geofluids/volume-2021/5562628/figures/5562628.fig.009b.svgz" name="5562628.fig.009b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Permeability damage rate under pass II</td></tr></table>

<div>Permeability damage rate under cyclic loading and unloading stress.</div>

Geofluids

fig9

Figure 9

Figure 9: Study on the Permeability Change Characteristic of Gas-Bearing Coal under Cyclic Loading and Unloading Path 